Auth bypass in Ladela Online Scheduling And Appointment Booking System – Bookly

CVE-2026-104898

The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 28.4 via the 'id, wp_user_id' parameter due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the WordPress account binding of any Bookly staff record, including those owned by administrators, effectively hijacking a higher-privileged staff member's account association and escalating privileges. Exploitation requires the attacking user to be linked to at least one Bookly staff record, which occurs by default whenever an admin enables the bookly_gen_allow_staff_edit_profile option (active on fresh installs) and links a WordPress user to a staff entry.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published .

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-104898?
CVE-2026-104898 is a medium-severity vulnerability in Ladela Online Scheduling And Appointment Booking System – Bookly, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.8/10. Published 2026-10-10.
How severe is CVE-2026-104898?
Medium severity. CVSS v3 base score is 6.8 out of 10.